Tripping trigger device for small residual-current circuit breaker

Abstract

The invention provides a tripping trigger device for a small residual-current circuit breaker. The tipping trigger device is characterized by comprising a shell, an electric leakage sensing assembly, a transmission part and a triggering part, wherein the electric leakage sensing assembly, the transmission part and the triggering part are arranged in the shell, the triggering part is suitable for triggering the tripping of a tripping mechanism, the electric leakage sensing assembly generates a horizontal impelling force after sensing leakage current with specific quantity, the transmission part rotates under the action of the horizontal impelling force, and the triggering part is driven to trigger the tripping of the tripping mechanism under the action of the rotating of the transmission part.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to a trip trigger device for a small leakage circuit breaker. Background technique [0002] In the household power supply system, for the safety of users and the protection of household appliances, small leakage circuit breakers are usually installed. With the continuous improvement of the power industry and the level of electricity consumption, the requirements for the performance and quality of the above small leakage circuit breakers are getting higher and higher. As we all know, the general small leakage circuit breaker is composed of the small circuit breaker body and the leakage tripping device, and many parts are used. It is required to develop a small leakage circuit breaker with small volume and high breaking capacity. [0003] Existing small leakage circuit breakers for leakage protection mainly include a tripping trigger device and a...

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Problems solved by technology

[0002] In the household power supply system, for the safety of users and the protection of household appliances, small leakage circuit breakers are usually installed. With the continuous improvement of the power industry and the level of electricity consumption, the requirements for the performance and quality of the above small leakage circuit breakers are getting higher and higher. As we all know, the general small leakage circuit breaker is composed of the small circuit breaker body and the leakage tripping device, and many parts are used. It is required to develop a small leakage circuit breaker with small volume and high breaking capacity

[0003] Existing small leakage circuit breakers for leakage protection mainly include a tripping trigger device and a tripping device capable of tripping under the action of the tripping trigger device. The tripping trigger device mainly includes a casing, a mechanism base, and a base plate , there are tripping coils, iron cores, test button springs, test buttons, circuit boards, zero-sequence transformers, tripping handles, U-shaped connecting rods, jumpers, locks and rotating seats in the shell. When the zero-sequence transformer senses the leakage current, the above-mentioned secondary side will output a voltage to the circuit board. When the voltage reaches a certain value, it will trigger the conduction of the thyristor installed on the above-mentioned circuit board. At this time, the thyristor connected in series The tripping coil on the conduction circuit will generate electromagnetic driving force. Under the action of electromagnetic driving force, the final tripping can be achieved through the multiple actions of the iron core, torsion spring and tripping handle. The above-mentioned tripping trigger device has a complex structure and a large volume. Large, large investment in mold development, long development cycle, no commonality with other small leakage circuit breakers

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